Many code requirements are not inspected.
Roof sheathing thickness code.
Minimum 270 fb 340 000 e.
Minimum thickness of lumber roof sheathing for si.
Never attach roof sheathing with staples.
Secure roof sheathing panels to the roof framing with 8d common nails spaced six inches on center at the edges and twelve inches on center at intermediate supports.
Sheathing should be a minimum of 19 32 inch thick.
Allowable spans for lumber floor and roof sheathing a b for si.
Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.
1 inch 25 4 mm.
You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness.
2018 international residential code.
The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.
Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.
Chapter 9 roof assemblies.
Chapter 8 roof ceiling construction.
That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.
Minimum 420 fb 660 000 e.
Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick.
The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures.
And for wood structural panel sheathing r803 2 2 allowable spans.
On the upcodes website.
According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing.
Contains sections covering roof framing roof sheathing and roof ventilation.
1 inch 25 4 mm.
Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span.
Loads will vary with the.
Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.
On the upcodes website.